Figure 11.
![Distribution of stellar parameters from GALAH catalogue (the first row) and LAMOST-SPEMR catalogue (the second row). The colour in this figure represents $\rm [Fe/H]$, and the three isochrones represent the evolutionary tracks of MIST stars with stellar ages of 7 Gyr [$\rm [Fe/H]$ = −0.5 (cyan), 0.0 (yellow), and 0.5 (red), respectively]. The samples in the figure are the 110 042 spectra obtained by cross-matching the LAMOST-SPEMR catalogue with the GALAH catalogue. The S/N intervals are $\rm 10 \le S/N \lt 20$, $\rm 20 \le S/N \lt 40$, $\rm 40 \le S/N \lt 60$, and $\rm 60 \le S/N \lt 100$, respectively.](https://oup.silverchair-cdn.com/oup/backfile/Content_public/Journal/mnras/523/4/10.1093_mnras_stad1778/1/stad1778fig11.jpeg?Expires=1749317431&Signature=ag0TRY9U369vE33sDS4mAwwoBl-8QDCslolBz0egVsLpwbRlcX6KXCDECVNQVZgtPobx~q2oWesv5Rob6cuklV3yBko9Et7rUp0Rmw~Q7RDSX4n17xSEGdaRlZK1y0CGkLzmV4PPrg9wb~FEFAWptFKLYyHrmAylhzzRus1f3Hp40qV670K~aEhcweUSNwRWyAiagbotEU3xK4B6raE7govR0-4tJ-TfXPrPE5LMVkNKjCp0L9mN~ZTMDsSTrxesW6zcWBvGA5ZR5NN-3~BknVXlAga-6-w0eJHNlR2kQe14i9KJxDV6RaegABkF1RbIvyYVGe~cSI5tAQ7Dg-OzOQ__&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA)
Distribution of stellar parameters from GALAH catalogue (the first row) and LAMOST-SPEMR catalogue (the second row). The colour in this figure represents |$\rm [Fe/H]$|, and the three isochrones represent the evolutionary tracks of MIST stars with stellar ages of 7 Gyr [|$\rm [Fe/H]$| = −0.5 (cyan), 0.0 (yellow), and 0.5 (red), respectively]. The samples in the figure are the 110 042 spectra obtained by cross-matching the LAMOST-SPEMR catalogue with the GALAH catalogue. The S/N intervals are |$\rm 10 \le S/N \lt 20$|, |$\rm 20 \le S/N \lt 40$|, |$\rm 40 \le S/N \lt 60$|, and |$\rm 60 \le S/N \lt 100$|, respectively.
